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Finding the Fourth Proportional to 2,878.36, 3,972.06 and 1,619.56

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Solution

The fourth proportional to 2,878.36, 3,972.06 and 1,619.56 is: 2,234.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,878.36 : 3,972.06 = 1,619.56 : x
  2. Step 2: Convert to fraction form
    2,878.36/3,972.06 = 1,619.56/x
  3. Step 3: Cross multiply
    2,878.36x = 3,972.06 × 1,619.56
  4. Step 4: Simplify right side
    2,878.36x = 6,432,989.49
  5. Step 5: Solve for x
    x = 6,432,989.49/2,878.36
  6. Step 6: Final answer
    x = 2,234.95

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.